Calibration device



FIG. 1 is a first perspective view of a calibration device showing our new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of a circled portion 9 of FIG. 1 ; and,

FIG. 10 is an enlarged view of a circled portion 10 of FIG. 1 .

The broken lines depict portions of the calibration device in which the design is embodied that form no part of the claimed design. 

CLAIM We claim the ornamental design for a calibration device, as shown and described. 